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为了更科学、准确地确定长输管道用X80钢级大口径三通的壁厚等设计参数,通过一系列X80三通的实物爆破试验开展验证试验法研究,采用三通塑性成型主支管壁厚减薄系数K值,建立了大口径三通壁厚设计计算公式,确定了系列X80钢级大口径三通壁厚等设计参数,形成了西气东输三线工程用X80三通技术条件。研究结果表明,推荐的X80大口径三通壁厚与采用面积补强方法确定的壁厚相比大幅减小,不仅节约了原材料成本,降低了产品生产难度,而且有利于进一步提高产品质量,为今后管道工程用大口径三通的设计和制造提供依据。
In order to more scientifically and accurately determine the design parameters such as wall thickness of X80 steel large-caliber tee for long-distance pipelines, a series of X80 three-way physical blasting tests were carried out to verify the test method. Three-way plastic forming main branch pipe wall Thickness thinning coefficient K value, the design formula of large-diameter tee thickness was established, and the design parameters of X80 steel grade large-caliber tee thickness were determined. The technical conditions for X80 tee construction of the third-line project of west-east gas transmission were formed. The results show that the recommended X80 large-diameter tee wall thickness is significantly reduced compared with the wall thickness determined by the area reinforcement method, not only saving raw material costs, reducing the difficulty of product production, but also conducive to further improve product quality for the future Pipeline engineering with large-caliber design and manufacture of tee provide the basis.